1 | // Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
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2 | // http://chaosforge.org/
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3 | //
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4 | // This file is part of NV Libraries.
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5 | // For conditions of distribution and use, see copyright notice in nv.hh
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6 |
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7 | #include "nv/lib/lua.hh"
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8 |
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9 | #if defined( NV_LUA_DYNAMIC )
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10 |
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11 | #include "nv/library.hh"
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12 |
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13 | #if NV_LUA_VERSION == NV_LUA_52
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14 | # undef luaL_loadfile
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15 | # undef luaL_loadbuffer
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16 | # undef luaL_prepbuffer
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17 | # undef lua_tonumber
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18 | # undef lua_tointeger
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19 | # undef lua_tounsigned
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20 | # undef lua_call
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21 | # undef lua_pcall
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22 | # undef lua_yield
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23 | #endif
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24 |
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25 | #define NV_LUA_FUN( rtype, fname, fparams ) rtype (*fname) fparams = nullptr;
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26 | #if NV_LUA_VERSION == NV_LUA_52
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27 | # define NV_LUA_FUN_51( rtype, fname, fparams )
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28 | # define NV_LUA_FUN_52 NV_LUA_FUN
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29 | #elif NV_LUA_VERSION == NV_LUA_51
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30 | # define NV_LUA_FUN_51 NV_LUA_FUN
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31 | # define NV_LUA_FUN_52( rtype, fname, fparams )
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32 | #else
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33 | # define NV_LUA_FUN_51( rtype, fname, fparams )
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34 | # define NV_LUA_FUN_52( rtype, fname, fparams )
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35 | #endif
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36 |
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37 | #include <nv/lib/detail/lua_functions.inc>
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38 |
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39 | #undef NV_LUA_FUN
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40 | #undef NV_LUA_FUN_51
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41 | #undef NV_LUA_FUN_52
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42 |
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43 | #if NV_LUA_VERSION == NV_LUA_5C
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44 | # define NV_LUA_COMPAT_FUN( rt, fn, fp,u1,u2,u3,u4,u5 ) rt (*fn) fp = nullptr;
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45 | # include <nv/lib/detail/lua_functions_compat.inc>
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46 | # undef NV_LUA_COMPAT_FUN
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47 | int LUA_UPVALUEINDEX = 0;
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48 | int LUA_REGISTRYINDEX = 0;
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49 | int LUA_VERSION_NUM = 0;
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50 | size_t (*lua_rawlen) (lua_State *L, int idx) = nullptr;
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51 | int (*lua_absindex) (lua_State *L, int idx) = nullptr;
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52 | void (*lua_getglobal) (lua_State *L, const char *var) = nullptr;
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53 | void (*lua_setglobal) (lua_State *L, const char *var) = nullptr;
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54 | void (*luaL_requiref) (lua_State *L, const char *modname, lua_CFunction openf, int glb) = nullptr;
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55 | void (*luaL_setmetatable) (lua_State *L, const char *tname) = nullptr;
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56 | void* (*luaL_testudata) (lua_State *L, int ud, const char *tname) = nullptr;
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57 | void (*lua_copy) (lua_State *L, int fromidx, int toidx) = nullptr;
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58 | int (*lua_compare) (lua_State *L, int idx1, int idx2, int op) = nullptr;
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59 | void (*lua_rawgetp) (lua_State *L, int idx, const void *p) = nullptr;
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60 | void (*lua_rawsetp) (lua_State *L, int idx, const void *p) = nullptr;
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61 | void (*lua_pushglobaltable)(lua_State* L) = nullptr;
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62 | void (*luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup) = nullptr;
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63 | int (*luaL_getsubtable) (lua_State *L, int idx, const char *fname) = nullptr;
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64 |
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65 | const lua_Number* (*lua_version) (lua_State *L) = nullptr;
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66 |
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67 | // only loaded in 5.1 mode to implement lua_compare
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68 | int (*lua_equal) (lua_State *L, int idx1, int idx2) = nullptr;
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69 | int (*lua_lessthan) (lua_State *L, int idx1, int idx2) = nullptr;
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70 |
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71 |
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72 | # define NV_LUA_COMPAT_FUN( u1,u2,u3,rt2,fn2,fp2,u4,u5 ) static rt2 (*fn2##_compat) fp2 = nullptr;
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73 | # include <nv/lib/detail/lua_functions_compat.inc>
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74 | # undef NV_LUA_COMPAT_FUN
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75 |
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76 | # define NV_LUA_COMPAT_FUN( rt, fn, fp, rt2, fn2, fp2,arg,ret ) \
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77 | rt call_##fn2##_compat fp { ret fn2##_compat arg; }
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78 | # include <nv/lib/detail/lua_functions_compat.inc>
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79 | # undef NV_LUA_COMPAT_FUN
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80 |
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81 | # define LUAI_MAXSTACK_52 1000000
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82 | # define LUAI_FIRSTPSEUDOIDX_52 (-LUAI_MAXSTACK_52 - 1000)
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83 | # define LUA_REGISTRYINDEX_52 LUAI_FIRSTPSEUDOIDX_52
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84 | # define LUA_GLOBALSINDEX_51 (-10002)
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85 | # define LUA_GLOBALSINDEX_52 2
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86 | # define LUA_REGISTRYINDEX_51 (-10000)
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87 | # define lua_upvalueindex_51(i) (LUA_GLOBALSINDEX_51-(i))
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88 | # define lua_upvalueindex_52(i) (LUA_REGISTRYINDEX_52-(i))
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89 |
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90 | int lua_absindex_51 (lua_State *L, int idx) { return (idx > 0 ? idx : idx + lua_gettop(L) + 1); };
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91 | void lua_getglobal_51 (lua_State *L, const char *var) { lua_getfield(L, LUA_GLOBALSINDEX_51, var ); };
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92 | void lua_setglobal_51 (lua_State *L, const char *var) { lua_setfield(L, LUA_GLOBALSINDEX_51, var ); };
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93 | void luaL_requiref_51 (lua_State *L, const char *modname, lua_CFunction openf, int glb)
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94 | {
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95 | lua_pushcfunction(L, openf);
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96 | lua_pushstring(L, modname);
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97 | lua_call(L, 1, 1);
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98 | if (glb != 0)
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99 | {
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100 | lua_pushvalue( L, LUA_GLOBALSINDEX_51 );
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101 | lua_pushvalue(L, -2);
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102 | lua_setfield(L, -2, modname);
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103 | lua_pop(L, 1);
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104 | }
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105 | }
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106 |
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107 | void luaL_setmetatable_51 (lua_State *L, const char *tname)
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108 | {
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109 | luaL_getmetatable(L, tname);
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110 | lua_setmetatable(L, -2);
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111 | }
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112 |
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113 | void *luaL_testudata_51 (lua_State *L, int ud, const char *tname)
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114 | {
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115 | void *p = lua_touserdata(L, ud);
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116 | if (p != NULL)
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117 | {
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118 | if (lua_getmetatable(L, ud))
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119 | {
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120 | luaL_getmetatable(L, tname);
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121 | if ( !lua_rawequal(L, -1, -2))
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122 | p = NULL;
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123 | lua_pop(L, 2);
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124 | return p;
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125 | }
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126 | }
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127 | return NULL;
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128 | }
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129 |
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130 | const lua_Number *lua_version_51 (lua_State*)
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131 | {
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132 | static const lua_Number version = (lua_Number)LUA_VERSION_NUM;
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133 | return &version;
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134 | }
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135 |
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136 | void lua_copy_51 (lua_State *L, int fromidx, int toidx)
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137 | {
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138 | toidx = lua_absindex( L, toidx );
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139 | lua_pushvalue( L, fromidx );
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140 | lua_replace( L, toidx );
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141 | }
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142 |
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143 | int lua_compare_51(lua_State *L, int idx1, int idx2, int op)
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144 | {
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145 | switch (op)
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146 | {
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147 | case LUA_OPEQ : return lua_equal( L, idx1, idx2 );
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148 | case LUA_OPLT : return lua_lessthan( L, idx1, idx2 );
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149 | case LUA_OPLE : return lua_lessthan( L, idx1, idx2 ) || lua_equal( L, idx1, idx2 );
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150 | default:
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151 | return 0;
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152 | }
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153 | }
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154 |
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155 | void lua_rawgetp_51(lua_State *L, int idx, const void *p)
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156 | {
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157 | idx = lua_absindex( L, idx );
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158 | void* pp = const_cast<void *>(p); // EVIL
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159 | lua_pushlightuserdata( L, pp );
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160 | lua_rawget( L, idx );
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161 | }
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162 |
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163 | void lua_rawsetp_51(lua_State *L, int idx, const void *p)
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164 | {
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165 | idx = lua_absindex( L, idx );
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166 | void* pp = const_cast<void *>(p); // EVIL
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167 | lua_pushlightuserdata( L, pp );
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168 | lua_insert( L, -1 );
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169 | lua_rawset( L, idx );
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170 | }
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171 |
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172 | int luaL_getsubtable_51(lua_State *L, int idx, const char *fname)
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173 | {
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174 | lua_getfield(L, idx, fname);
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175 | if ( lua_istable(L, -1) ) return 1;
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176 | else {
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177 | idx = lua_absindex(L, idx);
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178 | lua_pop(L, 1);
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179 | lua_newtable(L);
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180 | lua_pushvalue(L, -1);
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181 | lua_setfield(L, idx, fname);
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182 | return 0;
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183 | }
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184 | }
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185 |
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186 | void luaL_setfuncs_51(lua_State *L, const luaL_Reg *l, int nup)
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187 | {
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188 | luaL_checkstack(L, nup, "too many upvalues");
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189 | for (; l->name != NULL; l++)
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190 | {
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191 | for (int i = 0; i < nup; i++)
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192 | {
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193 | lua_pushvalue(L, -nup);
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194 | }
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195 | lua_pushcclosure(L, l->func, nup);
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196 | lua_setfield(L, -(nup + 2), l->name);
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197 | }
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198 | lua_pop(L, nup);
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199 | }
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200 |
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201 | void lua_pushglobaltable_51(lua_State* L)
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202 | {
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203 | lua_pushvalue( L, LUA_GLOBALSINDEX_51 );
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204 | }
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205 |
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206 | void lua_pushglobaltable_52(lua_State* L)
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207 | {
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208 | lua_rawgeti( L, LUA_REGISTRYINDEX_52, LUA_GLOBALSINDEX_52 );
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209 | }
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210 |
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211 | #endif
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212 |
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213 | bool nv::load_lua_library( const char* path )
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214 | {
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215 | static nv::library lua_library;
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216 | if ( lua_library.is_open() ) return true;
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217 | #if NV_LUA_VERSION == NV_LUA_5C
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218 | if ( path == nullptr )
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219 | {
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220 | if (!lua_library.try_open( NV_LUA_PATH_JIT ) &&
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221 | !lua_library.try_open( NV_LUA_PATH_52 ) )
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222 | {
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223 | lua_library.open( NV_LUA_PATH_51 );
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224 | }
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225 | }
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226 | else
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227 | #else
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228 | lua_library.open( path );
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229 | #endif
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230 |
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231 | # define NV_LUA_FUN( rtype, fname, fparams ) *(void **) (&fname) = lua_library.get(#fname);
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232 | # if NV_LUA_VERSION == NV_LUA_52
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233 | # define NV_LUA_FUN_51( rtype, fname, fparams )
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234 | # define NV_LUA_FUN_52 NV_LUA_FUN
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235 | # elif NV_LUA_VERSION == NV_LUA_51
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236 | # define NV_LUA_FUN_51 NV_LUA_FUN
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237 | # define NV_LUA_FUN_52( rtype, fname, fparams )
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238 | # else
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239 | # define NV_LUA_FUN_51( rtype, fname, fparams )
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240 | # define NV_LUA_FUN_52( rtype, fname, fparams )
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241 | # endif
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242 |
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243 | # include <nv/lib/detail/lua_functions.inc>
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244 |
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245 | # undef NV_LUA_FUN
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246 | # undef NV_LUA_FUN_51
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247 | # undef NV_LUA_FUN_52
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248 |
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249 | #if NV_LUA_VERSION == NV_LUA_5C
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250 | # define NV_LUA_LOAD( fname ) *(void **) (&fname) = lua_library.get(#fname);
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251 | # define NV_LUA_LOAD_AS( fname,fname2 ) *(void **) (&fname) = lua_library.get(#fname2);
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252 | bool version_52 = lua_library.try_get("luaL_checkversion_") != nullptr;
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253 | if (version_52)
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254 | {
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255 | # define NV_LUA_COMPAT_FUN( u1, fn, u2, u3, fn2, u5, u6, u7 ) \
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256 | *(void **) (&(fn2##_compat)) = lua_library.get(#fn2); \
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257 | fn = call_##fn2##_compat;
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258 | # include <nv/lib/detail/lua_functions_compat.inc>
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259 | # undef NV_LUA_COMPAT_FUN
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260 | NV_LUA_LOAD( lua_rawlen );
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261 | NV_LUA_LOAD( lua_absindex );
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262 | NV_LUA_LOAD( lua_getglobal );
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263 | NV_LUA_LOAD( lua_setglobal );
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264 | NV_LUA_LOAD( luaL_setmetatable );
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265 | NV_LUA_LOAD( luaL_testudata );
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266 | NV_LUA_LOAD( lua_version );
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267 | NV_LUA_LOAD( lua_copy );
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268 | NV_LUA_LOAD( lua_compare );
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269 | NV_LUA_LOAD( lua_rawgetp );
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270 | NV_LUA_LOAD( lua_rawsetp );
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271 | NV_LUA_LOAD( luaL_setfuncs );
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272 | NV_LUA_LOAD( luaL_getsubtable );
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273 | NV_LUA_LOAD( luaL_requiref );
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274 |
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275 | lua_pushglobaltable = lua_pushglobaltable_52;
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276 |
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277 | LUA_UPVALUEINDEX = LUA_REGISTRYINDEX_52;
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278 | LUA_REGISTRYINDEX = LUA_REGISTRYINDEX_52;
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279 | LUA_VERSION_NUM = 502;
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280 | }
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281 | else
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282 | {
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283 | # define NV_LUA_COMPAT_FUN( u1, fn, u2, u3, u4, u5, u6, u7 ) \
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284 | *(void **) (&fn) = lua_library.get(#fn);
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285 | # include <nv/lib/detail/lua_functions_compat.inc>
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286 | # undef NV_LUA_COMPAT_FUN
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287 | NV_LUA_LOAD_AS( lua_rawlen, lua_objlen )
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288 | lua_absindex = lua_absindex_51;
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289 | lua_getglobal = lua_getglobal_51;
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290 | lua_setglobal = lua_setglobal_51;
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291 | luaL_setmetatable = luaL_setmetatable_51;
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292 | luaL_testudata = luaL_testudata_51;
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293 | lua_version = lua_version_51;
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294 | lua_copy = lua_copy_51;
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295 | lua_rawgetp = lua_rawgetp_51;
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296 | lua_rawsetp = lua_rawsetp_51;
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297 | lua_pushglobaltable = lua_pushglobaltable_51;
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298 | luaL_setfuncs = luaL_setfuncs_51;
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299 | luaL_getsubtable = luaL_getsubtable_51;
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300 | luaL_requiref = luaL_requiref_51;
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301 |
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302 | NV_LUA_LOAD( lua_lessthan );
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303 | NV_LUA_LOAD( lua_equal );
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304 | lua_compare = lua_compare_51;
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305 | LUA_UPVALUEINDEX = LUA_GLOBALSINDEX_51;
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306 | LUA_REGISTRYINDEX = LUA_REGISTRYINDEX_51;
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307 | LUA_VERSION_NUM = 501;
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308 | }
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309 | # undef NV_LUA_LOAD
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310 | #endif
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311 |
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312 | return true;
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313 | }
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314 |
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315 | #endif
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